A201444 Number of n X n 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

4, 2, 52, 112, 4544, 16334, 1129682, 5464208, 458459214, 2605975384, 253569083138, 1617730690396

Offset

1,1

Comments

Diagonal of A201451

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=6
..0..0..0..0..0..1....0..0..0..0..1..1....0..0..0..1..2..2....0..0..0..0..1..1
..0..0..1..2..2..2....0..0..0..0..1..1....0..0..1..1..2..3....0..0..0..0..2..2
..0..0..1..2..3..3....0..1..1..1..1..1....0..1..1..2..2..3....0..1..1..1..2..2
..1..1..2..2..3..3....2..2..2..2..2..3....0..1..1..2..2..3....1..1..2..2..2..2
..1..1..2..2..3..3....2..2..2..3..3..3....0..1..1..2..2..3....1..1..2..3..3..3
..1..1..2..3..3..3....2..3..3..3..3..3....0..3..3..3..3..3....3..3..3..3..3..3

Crossrefs

Sequence in context: A362155 A163176 A277306 * A236381 A335300 A201228

Adjacent sequences: A201441 A201442 A201443 * A201445 A201446 A201447

Keyword

nonn

Author

R. H. Hardin Dec 01 2011

Status

approved